<template>
  <div>
      <!-- 面包屑导航区 -->
    <el-breadcrumb separator-class="el-icon-arrow-right" class="breadcrumb">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>商品管理</el-breadcrumb-item>
      <el-breadcrumb-item>添加商品</el-breadcrumb-item>
    </el-breadcrumb>
    <!-- 卡片试图区域 -->
    <el-card>
    <!-- 警告区 -->
        <el-alert
        title="添加商品信息" center
        type="info" show-icon :closable="false">
        </el-alert>
        <!-- 步骤条 -->
        <el-steps :space="200" :active="activeIndex-0" align-center
        finish-status="success">
            <el-step title="基本信息"></el-step>
            <el-step title="商品参数"></el-step>
            <el-step title="商品属性"></el-step>
            <el-step title="商品图片"></el-step>
            <el-step title="商品内容"></el-step>
            <el-step title="完成"></el-step>
        </el-steps>
        <el-form :model="addForm" :rules="addFormRules" 
        ref="addFormRef" label-width="100px"
        label-position="top">
            <!-- tab栏区域 -->
            <el-tabs :tab-position="'left'" @tab-click="tabClicked"
            v-model="activeIndex" :before-leave="beforeTabLeave">
            <!-- 基本信息区域 -->
                <el-tab-pane label="基本信息" name="0">
                    <el-form-item label="商品名称" prop="goods_name">
                        <el-input v-model="addForm.goods_name"></el-input>
                    </el-form-item>
                    <el-form-item label="商品价格" prop="goods_price">
                        <el-input type="number"
                         v-model="addForm.goods_price"></el-input>
                    </el-form-item>
                    <el-form-item label="商品重量" prop="goods_weight">
                        <el-input v-model="addForm.goods_weight"></el-input>
                    </el-form-item>
                    <el-form-item label="商品数量" prop="goods_number">
                        <el-input v-model="addForm.goods_number"></el-input>
                    </el-form-item>
                    <el-form-item label="商品分类">
                        <el-cascader
                            v-model="addForm.goods_cat"
                            :options="cateList"
                            :props="cateProps"
                            @change="handleChange"
                            clearable
                        ></el-cascader>
                    </el-form-item>
                </el-tab-pane>
                <!-- 商品参数区域 -->
                <el-tab-pane label="商品参数" name="1">
                    <!-- 渲染表单item项 -->
                    <el-form-item :label="item.attr_name" v-for="item in manyTableData"
                    :key="item.attr_id">
                         <!-- 复选框组 -->
                        <el-checkbox-group v-model="item.attr_vals">
                            <el-checkbox :label="cb"
                            v-for="(cb,i) in item.attr_vals"
                            :key="i" border></el-checkbox>
                        </el-checkbox-group>
                    </el-form-item>
                </el-tab-pane>
                <!-- 商品属性区域 -->
                <el-tab-pane label="商品属性" name="2">
                    <el-form-item :label="item.attr_name" 
                    v-for="item in onlyTableData" 
                    :key="item.attr_id">
                        <el-input v-model="item.attr_vals"></el-input>
                    </el-form-item>
                </el-tab-pane>
                <!-- 商品图片区 -->
                <el-tab-pane label="商品图片" name="3">
                    <!-- action表示图片要上传到的后台api地址 -->
                    <el-upload
                    :action="uploadURL" :headers="headerObj"
                    :on-preview="handlePreview"
                    :on-remove="handleRemove"
                    list-type="picture"
                    :on-success="handleSuccess">
                    <el-button size="small" type="primary">点击上传</el-button>
                    </el-upload>
                </el-tab-pane>
                <!-- 商品内容区域 -->
                <el-tab-pane label="商品内容" name="4">
                    <!-- 富文本编辑器 -->
                    <quill-editor v-model="addForm.goods_introduce"></quill-editor>
                    <!-- 添加商品的按钮 -->
                    <el-button type="primary" class="btnAdd" @click="add">添加商品</el-button>
                </el-tab-pane>
            </el-tabs>
        </el-form>
    </el-card>
    <!-- 图片预览对话框 -->
    <el-dialog
    title="图片预览"
    :visible.sync="previewVisible"
    width="50%">
        <img :src="previewPath" alt="" class="previewImg">
    </el-dialog>
  </div>
</template>

<script>
import _ from 'lodash'
export default {
    data(){
        return{
            activeIndex: '0',
            // 添加商品的验证数据对象
            addForm:{
                goods_name:'',
                goods_price:'0',
                goods_weight:'0',
                goods_number:'0',
                // 商品所属的分类数组
                goods_cat:[],
                // 图片的数组
                pics:[],
                // 商品介绍
                goods_introduce:'',
                attrs:[],
            },
            addFormRules:{
                goods_name:[{ required: true, 
                message: '请输入商品名称', trigger: 'blur' },],
                goods_price:[{ required: true, 
                message: '请输入商品价格', trigger: 'blur' },],
                goods_weight:[{ required: true, 
                message: '请输入商品重量', 重量: 'blur' },],
                goods_number:[{ required: true, 
                message: '请输入商品数量', 重量: 'blur' },],
            },
            // 商品分类列表
            cateList:[],
            // 级联选择器的配置对象
            cateProps:{
                label:'cat_name',
                value:'cat_id',
                children:'children',
                expandTrigger: 'hover'
            },
            // 动态参数列表数据
            manyTableData:[],
            // 静态属性列表数据
            onlyTableData:[],
            // 上传的url地址
            uploadURL:'http://127.0.0.1:8888/api/private/v1/upload',
            // 图片上传组件的headers请求头
            headerObj:{
                Authorization: window.sessionStorage.getItem('token')
            },
            previewPath:'',
            previewVisible: false,
        }
    },
    created(){
        this.getCateList();
    },
    methods:{
        // 获取所有商品分类数据
        async getCateList(){
            const {data:res}= await this.$http.get('categories');
            if(res.meta.status!=200){
                return this.$message.error('获取商品列表失败');
            }
            this.cateList=res.data;
        },
        // 级联选择器选中项变化会触发
        handleChange(){
            if(this.addForm.goods_cat.length!==3){
                this.addForm.goods_cat=[];
            }
        },
        beforeTabLeave(activeName,oldActiveName){
            if(oldActiveName==='0' && this.addForm.goods_cat.length!==3){
                this.$message.error('请先选择商品分类')
                return false;
            }
        },
        async tabClicked(){
            // console.log(this.activeIndex);
            // 访问的是动态参数面板
            if(this.activeIndex==='1'){
                const {data:res}=await this.$http.get
                (`categories/${this.cateId}/attributes`,{
                    params:{sel:'many'}
                });
                if(res.meta.status!==200){
                    return this.$message.error('获取动态参数列表失败');
                };
                res.data.forEach(item=>{
                    item.attr_vals=item.attr_vals.length===0 
                    ? [] :item.attr_vals.split(' ');
                })
                this.manyTableData=res.data;
            }else if(this.activeIndex==='2'){
                // 访问的是静态属性面板
                const {data:res}=await this.$http.get
                (`categories/${this.cateId}/attributes`,{
                    params:{sel:'only'}
                });
                if(res.meta.status!==200){
                    return this.$message.error('获取静态属性列表失败');
                };
                this.onlyTableData=res.data;
                console.log(this.onlyTableData,'only11');
            }
        },
        // 处理图片预览效果
        handlePreview(file){
            this.previewPath=file.response.data.url;
            this.previewVisible=true;
        },
        // 处理移出图片的操作
        handleRemove(file){
            // 要被删除的图片的临时路径
            const filePath=file.response.data.tmp_path;
            // 从pics数组中找到对应的索引值
            const i=this.addForm.pics.findIndex(x=>{
                x.pic===filePath;
            });
            // 通过索引值移出图片
            this.addForm.pics.splice(i,1);
        },
        // 监听图片上传成功的事件
        handleSuccess(response){
            // 1、拼接得到一个图片信息对象
            const picInfo={pic:
            response.data.tmp_path}
            // 2、将图片信息对象，push到pics数组中
            this.addForm.pics.push(picInfo);
            console.log(this.addForm);
        },
        // 添加商品
        add(){
            // 判断是否合法
            this.$refs.addFormRef.validate(async valid=>{
                if(!valid){
                    return this.$message.error('请填写必要的表单项')
                }
                // 执行添加的业务逻辑
                // lodash  cloneDeep(obj)
                const form=_.cloneDeep(this.addForm);
                form.goods_cat=form.goods_cat.join(',');
                // 处理动态参数，
                this.manyTableData.forEach(item =>{
                    const newInfo = {
                        attr_id: item.attr_id,
                        attr_value: item.attr_vals.join(' ')
                    };
                    console.log('@');
                    this.addForm.attrs.push(newInfo);
                })
                this.onlyTableData.forEach(item =>{
                    const newInfo = {
                        attr_id: item.attr_id,
                        attr_value: item.attr_vals
                    };
                    console.log('@');
                    this.addForm.attrs.push(newInfo);
                })
                form.attrs=this.addForm.attrs;
                console.log(form,'form*');
                // 发起请求添加商品
                // 商品的名称必须是唯一的
                const {data:res}=await this.$http.post('goods',form);
                if(res.meta.status!==201){
                    return this.$message.error('添加商品失败')
                }
                this.$message.success('添加商品成功')
                this.$router.push('/goods');
            })
        }
    },
    computed:{
        cateId(){
            if(this.addForm.goods_cat.length===3){
                return this.addForm.goods_cat[2];
            }
            return null;
        }
    }
    
}
</script>

<style lang="less" scoped>
.el-checkbox{
    margin: 0 10 px 0 0 !important;
}
.previewImg{
    width: 100%;
}
.btnAdd{
    margin-top: 15px;
}
</style>